Grinding machine



Jun 17, 1930. E. BANNER 1,763,647

GRINDING MACHINE Filed Sept. 28, 1923 4 Sheets-Sheet 1 'INVENTUR PET 1- "Edward Danner.

June 17, 1930.

E. DANNER 1,763,647

GRINDING MACHINE 4 Sheets-Sheet 2 Filed Sept. 28, 1925 m INVENTUR E a] ward Dannex June 17, 1930 E, DANNER 1,763,647

GRINDING MACHINE Filed Sept. 28, 1923 4 Sheets-Sheet 3 INTENT UR Edwa/dDdnnek June 17, 1930.

E. DANNE'R 1,763,647

GRINDING MACHINE Filed Sept. 28, 1925 4 Sheets-Sheet 4 IN ENTUR v EdwaraDa/men gwme Patented June 17, 1930 UNITED STATES PATENT; OFFICE EDWARD DANNER, OE NEWARK, OHIO, ASSIGNOR TO THE LIBBEY GLASS MANUFAC- TURING COMPANY, OF TOLEDO, OHIO, A CORPORATION OF OHIO GRINDING MACHINE Application filed September 28, 1923. Serial No. 665,268.

The more specific features of this inven- 29 tion will appear as the description'proceeds. Referring to the accompanying drawings forming a part of this specification:

Fig. 1 is a side elevation of a machine embodying my invention, parts being broken,

away;

Fig. 2 is a plan view of the machine, like-- wise having parts broken away;

Figs. 3, 4, 5 and 6 are views of various forms 16 of article holders which may be used in the machine;

Fig. 7 is a section on the line 77 of Fig. 5; Fig. 8 is a section on the line 8-8 of Fig. 6. Any suitable frame, 10, supports the vari- 9 ous portions of the machine.

The grindin wheel, 11, is supported upon a suitable bearing, 12, and is driven through any suitable connection to a source of power,

belt pulleys 13 and 14 being shown to receive the power.

A central upright shaft, 15, drives the grinding Wheel, and near the top of this same shaft there is fixed a worm, 16, which drives worm wheels 17 and 18 on shafts 19 and 20. Each end of'shafts 19 and 20 carries a spiral gear 21, meshing with a spiral gear, 22, actuating an article carrier. The operating mechanism of each carrier is the same, so that but one need be described.

A sleeve, 23, is fixed to and projects downward from the hub of gear 22, and carries an article holder at its lower end. As shown, there is a hub piece, 24, fitting into the lower end of the sleeve and held against relative rotation by a screw, 25, which projects through the sleeve into a longitudinal groove, 26, in the hub piece. A look nut, 27, limits the entrance of the hub piece into the sleeve.- The lower end of the hub piece carries a lug, 28,

adapted to fit into a keyway 29, in an article holder.

As shown in Figs. 3 to 6 lncluslve, the-article holders are of a substantially circular outline, with a slot, 30, in one side leading to a central opening. This slot will receive the reduced upper portion of the hub piece and when properly positioned the holder may be slid down into place on the end of the hub piece with the lug 28 in one of the key ways,-

The holder, 31, shown in Fig. 3, comprises a circumferential member, 32, with transverse peripheral notches, 33, each adapted to receive a glass article, 34. Lugs 35, 36, project from the periphery on the sides of the slot 30, and each has a series of corrugations, 37, to hold rings, 38, in adjusted position thereon. The ring on lug 36 is attached directly to one end of a belt, B. The belt is passed around the articles on the holder and attached to the ring on lug 35 by means of a spring, 39, which'produces constant tension that will hold the articles in place.

The holder 40, shown in Fig. 4, has similar peripheral notches, 41, for the reception of articles. A series of radially slidable rods, 42, are constantly urged inward by springs, 43. Each rod carries, at its outer end, a contact piece, 44, which is adapted to hold two articles in place in adjacent notches.

The holder, 45, shown in Fig. 5 has a circular series of perforations, 46, which are adapted to receive articles, 47, larger at one end than at the other. The smaller ends are held in place by a series of contact members, 48, attached to radially slidable rods, 49, urged inward by springs, 50, while the larger ends are held in place by similar contact pieces, '51, attached to'radially slidable rods, 52, urged inward by springs, 53.

The holder, 54, shown in Fig. 6 is adapted to hold oblong articles, and has a series of slots, 55, for their reception. The edges of the slots are cut away, asat 56, for ease in grasping the articles when removing them 63 and 64, to a pull rod, 65. The pull rod slides through a bracket, 66, on the frame, and its lower end is connected to a chain, 67, which passes around an elevating sprocket 67, shown on Fig. 2, operated from handle 68, through miter gears, 69, 70. A counterbalancing weight, 71, is attached to the lower end of chain 69. Collars 72, 73, limit the travel of the pull rod, 65.

The slide rod, 60, projects downward into the sleeve 23 and carries, near its lower end, a member, 74, extending out through a slot, 75, in the sleeve, and attached to a hood, 76, which slides vertically outside of the sleeve.

The hood has a bearing surface, 77, on its under side, which is adapted to bear upon the upper side of the articles being ground. Removable weights, 78, make it possible to adjust the pressure exerted by the hood.

The operation of the device is as follows: Article carriers suitable for the particular articles to be ground are selected and filled with articles. Handles 68 are operated to raise the hoods, 76, and the carriers are slid into place on the hub pieces. The hoods are.

lowered and the surfaces, 77, rest oh the upper endsof the articles. The handles, 68, are turned until the chains 67 beneath the rods are slack, and a catch, not shown, holds the elevating rollers in that position. As the shaft 15 rotates, the grinding wheel is whirled beneath the articles resting thereon, and the holders are turned so that the grinding of the various articles'will be uniform and the grinding surface rubs past each article from all directions, as the article is turned with respect to the direction of travel of the wheel.

After the articles in a holder are ground on one side, the hood is lifted, the holder removed from the hub piece, turned over, and replaced, Then the hood is lowered, and the other face of the article is ground. The stop 73 may be set so that the articles will be relieved of the weight of the hood when they are sufficiently ground, with the result that the distance between ground faces is the same in all the articles, not only in those that are ground in one holder, but those that are ground in holders adjusted to the desired distance'.

Where means for keeping the articles from dropping outof the holder are omitted, as in the holder shown in Fig.6, the loading is done with the holder in place in the machine,

and after the first grinding the hood is raised and the articles taken out and turned over one at a time, the hood lowered, and the second surface ground. The function of the holder during grinding is essentially that of a guide, the hood being depended upon to press the articles against the grinding surface. handled without serious loss of time, but where a considerable number are ground in one holder it is an-advanta e to fasten them in so that they may be tu avoided.

In some cases the use of the hood might be ed with the holder and in- V dividual handling between grindings may be omitted and the articles might be clamped in a holder that would exert sufficient pressure to produce the desired grindin The approach of the holder to the grin ing surface 15 limited by a flange, 79, on the hub piece, and when the articles are clamped tightly enou h to prevent their movement relative to t e holder during grinding, the amount they are ground may be limited by the position of the ange.

Other changes may be made within the scope of the appended claims without departing from the spirit of the invention.

What I claim is:

1. In grinding apparatus, a member having a flat grinding surface, a holder adapted to revolve a plurality of articles about an axis normal to the grinding surface, a presser member moving with the holder and having a fiat surface adapted to contact an annular series of articles in the holder, and means to maintain the presser member with its pressifng surface parallel with the grinding surace.

2. A grinding machine comprising a grinding wheel having a vertical axis and a horizontal grinding face, a plurality of article carriers each comprising a vertical rotating slotted sleeve, a hub piece carried by the lower end of the sleeve and having an enlargement on its lowerend, an article holder adapted to receive and hold a series of articles around its axis and to be mounted upon the hub piece enlargement to rotate therewith, a hood slidably mounted outsideof the sleeve and having a lower face parallel with the grinding face and adapted to rest upon articles in the holder, a rod slidably mounted within the sleeve and connected with the hood through the slot of the sleeve, a device Articles of considerable size may be individually between grindings 

